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Finding the Fourth Proportional to 84,101.90, 126,328.35 and 70,979.90

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Solution

The fourth proportional to 84,101.90, 126,328.35 and 70,979.90 is: 106,617.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,101.90 : 126,328.35 = 70,979.90 : x
  2. Step 2: Convert to fraction form
    84,101.90/126,328.35 = 70,979.90/x
  3. Step 3: Cross multiply
    84,101.90x = 126,328.35 × 70,979.90
  4. Step 4: Simplify right side
    84,101.90x = 8,966,773,650.17
  5. Step 5: Solve for x
    x = 8,966,773,650.17/84,101.90
  6. Step 6: Final answer
    x = 106,617.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.